One of these is not an organ of Organisation of Petroleum exporting countries.
Answer Details
The General Assembly is not an organ of the Organization of the Petroleum Exporting Countries (OPEC). OPEC is an intergovernmental organization that was established to coordinate and unify the petroleum policies of its member countries. The main organs of OPEC are the Conference, the Board of Governors, and the Secretariat. The Conference is the supreme authority of OPEC and is comprised of representatives from each member country. The Board of Governors is responsible for overseeing the implementation of OPEC's policies and decisions, while the Secretariat is responsible for carrying out the day-to-day work of the organization.